Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa3825a2ac4b174…

MALICIOUS

PDF

41.6 KB Created: 2020-08-07 15:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: de0ac0a0c9e845cd16564477ff207022 SHA-1: ba9b88d1398ca523d70b962ae6fae34ead5fedda SHA-256: 0fa3825a2ac4b174054142b148baa7a9f967c57ee26aaa82f690d5a7bb660365
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the primary goal is to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=html+5+tags+pdf In PDF document text
    • http://lozob.juliedoherty.com/uploads/1/3/1/4/131437778/1085707.pdfIn PDF document text
    • http://files.celestechristieart.com/uploads/1/3/0/9/130969061/c1fa8405d5dc.pdfIn PDF document text
    • http://tokunajax.londonpokersocial.com/uploads/1/3/0/8/130874359/32b2ef1f0e.pdfIn PDF document text
    • http://vazajet.bodytherapybydai.com/uploads/1/3/1/4/131438216/fa57177d6b0b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4206/1986/files/tawogeduwudakik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/76195527852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/zunabixamunanunuvukezam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0859/files/think_like_a_man_free_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/antiepileptic_drugs_side_effects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/94506108639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8596/9048/files/97775032946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/46444956866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/31708892107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/91263863823.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F63 5348 bytes
SHA-256: aa3193db6a2552950c3242297a642fc661a2d0fc7a9595fd281f384f36600642
font_01_sfnt_off00007185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7185 12384 bytes
SHA-256: a120e11bb511b4e7f0ac578e4b5764d3eb538049c17b09e9281bb3ee02e43366

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